Hi there,
nohup is just a shortcut. I would recommend you not to use it . Use an init script, systemd, Upstart, or whatever your operating system recommends. bin/kibana is just a bash script that started up the node process, so it'll show up in your process list as node.
https://www.elastic.co/guide/en/kibana/current/production.html
Cheers
Rashmi